如何在主控制台应用中调用公共静态异步无效

Question

我有以下类GetProjectClass，带有public static async void GetProjects()

我想调用此方法/类，以便它对异步编程执行"一些新的东西"–目标是务实地连接到TFS

我有以下代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication2
{
public class GetProjectClass
{
public static async void GetProjects()
{
try
{
var personalaccesstoken = "PAT_FROM_WEBSITE";
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(
new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(string.Format("{0}:{1}", "", personalaccesstoken))));
using (HttpResponseMessage response = client.GetAsync(                    "https://{account}.visualstudio.com/DefaultCollection/_apis/projects").Result)
{response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseBody);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
}
} 

下面是我的程序.cs文件，想调用上面的文件，想知道这是否可能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            GetProjectClass t = new GetProjectClass();
            t.GetProjects().Wait();
            Console.WriteLine("finished");
            Console.ReadKey();
        }
    }
}

Answer 1

从 C# 7.1 开始，您可以使用异步主方法：

class Program
{
    static async Task Main(string[] args)
    {
        GetProjectClass t = new GetProjectClass();
        await t.GetProjects();
        Console.WriteLine("finished");
        Console.ReadKey();
    }
}

在 C# 7.1 之前，这是不可能的.
注意：您需要更改GetProjects以返回任务才能使其正常工作。